Shiftin' Question

you could also go too u -tube and wacth it how its done too,

 

Its not because double clutching is the right or wrong way..its whats best for the equipment...

That little bit of grind you hear is wear and tear on the trans when you float..Personally..I would rather, If I owned the truck, replace a clutch at 2k than a much more expensive trans because the gears have been worn to nubs from floating..You can always tell and old truck that was floated..by its mushy shifting and worn out shift gates....

i've always double clutched.

Petey

 

This is exactly what they told us in orientation at Roehl. They want us to double clutch because of floating wearing down the gears. They told us they'd rather replace a few clutches than a whole transmission.

sent from DrtyDiesel

 

Doesn't take as long to replace a clutch either LOL

Petey

 

I read this and think you are all crazy! I've only floated gears in the 12 years i've had my cdl. Its rare to grind a gear for me, if your doing it right it should float right in. I've tried double clutching and thats when the gears grind. To double clutch don't you still have to match your rpms?

 

Nope

clutch..shift neutral..clutch to higher gear..theclutch discos the trans from the engine..and lets the syncro's get the speeds patched on the gears..don't bump on an upshift..only on a down shift

Down shifts clutch..neutral..bump to fifteen hundred, clutch and in it goes..a day or two of practice down shifting and yu can nail it without grinding..its knowing when the gears are spinning just right..kind of like floating..but again..the main shaft isn't hooked to the engine so the trans can sync up better

Petey

 

In 32 years of floating I have yet to replace a transmission because of the floating. I have never replaced a clutch in a truck that I was the sole driver in.
I have had to replace clutches in three trucks that I have bought used.
I have had to rebuild a couple of shift towers that became sloppy and one super ten for bad bearings .
I usually run my trucks to at least 1.5 million miles .
You shouldn't even have to think about a tranny in a truck .
There is no reason to ride or slip a clutch if you know what you are doing .
The hardest think on the whole drive line is shock ! Bang and clang gas and go will tear stuff up real fast . There is no need to dump the clutch and mash the gas all you are doing is shortening the life of the driveline .

That's the way I see it anyway you can and will do as you please.

 

I do both and they both work. If done correctly, wear and tear using either method is minimal.

 

I f you want to be a professional double clutch,lmao.There is a lot more to being a professional driver than whether you float or double clutch,lol.Ive been floating since I started and quarantee I know more about being a professional driver than you.And I learn more every day.All you old timers out there that float,your not a professional,just thought I would let you all know that.I just learned that today.lmfao.Floating gears if done properly,puts no more wear on the tranny than double clutching.I quess I better get back to school and learn how to be a professional.

 

Big trucks in America don't have synchros. I've heard of some in the European markets. All the clutching does is release the engine torque off the driveline by seperating the engine from the transmission. You still have to match road speed with engine speed either way. If you learn to float properly, you are actually saving clutch wear and not hurt the transmission one bit. One can grind either way.

FD, the manufacturer recommends using the clutch. But either way is acceptable. Other than road tests which you must double clutch, nobody will say a word. Mechanics like drivers that are good floaters. It's less work on them.

Imagine two different shafts with a gear on each end spinning. The engine is turning one shaft/gear and the back tires because of road speed is turning the other shaft/gear. You try to mesh two gears spinning different speeds, you can't get them to go together. But if make the engine spin that one gear the same speed as the other gear, then you can slide them together. There's a little more to it with gear sizes, but that's how it works in general. When you hear someone grind the gears, the two gears aren't quite spinning the same speed.

Now like Petey mentioned, cars have synchronizers. It's a little brass ring with special notches on them. One synchro sits beside each gear. Their purpose is to grab two gears spinning different speeds and guide them together.

The brass syhcro's are somewhat fragile and can be easily broken if someone doesn't clutch in a car. Due to a truck being heavy duty they don't use them. There would be all kinds of repair problems from new drivers.

You'll find at least 90% of experienced drivers floating. Learn clutching first and when you have the timing/rpm thing down, then you can learn to float.